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log.cpp    66 lines (57 with data), 1.8 kB

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/* Copyright (C) 2014 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "log.h"
#include <errno.h>
#include <fstream>
using namespace std;
Logger::Logger(const std::string& fn)
: m_tocerr(false), m_loglevel(LLDEB), m_fn(fn)
{
reopen(fn);
}
bool Logger::reopen(const std::string& fn)
{
#if LOGGER_THREADSAFE
std::unique_lock<std::mutex> lock(m_mutex);
#endif
if (!fn.empty()) {
m_fn = fn;
}
if (!m_tocerr && m_stream.is_open()) {
m_stream.close();
}
if (!m_fn.empty() && m_fn.compare("stderr")) {
m_stream.open(m_fn, std::fstream::out | std::ofstream::trunc);
if (!m_stream.is_open()) {
cerr << "Logger::Logger: log open failed: for [" <<
fn << "] errno " << errno << endl;
m_tocerr = true;
} else {
m_tocerr = false;
}
} else {
m_tocerr = true;
}
return true;
}
static Logger *theLog;
Logger *Logger::getTheLog(const string& fn)
{
if (theLog == 0)
theLog = new Logger(fn);
return theLog;
}